WanderSearch Auckland Charitable Trust manages a tracking program called WanderSearch Auckland, which consists of a simple radio frequency tracking unit and tracking devices.
The tracking unit is a New Zealand manufactured product and uses simplex radio frequencies on bands 310 and 311 which are public frequencies.
The tracking unit comprises the Regal VHF Tracking Receiver, a directional aerial and a roof mount aerial.
The tracking devices come in various designs. Each device works on a radio band and a three digit frequency which is separated by five megahertz. The pulse from the tracking device can be picked up from a high point using the directional or roof mount aerials up to five kilometre away.
The key-ring device is similar to the pendant in shape and colour except it has a small loop at the top which allows it to be attached to house keys, belt loops or pinned to clothing.
The key-ring has an internal aerial which means that the pulse, from a high point will only transmit up to three kilometres away.
The wrist device has an internal aerial which means that the pulse, from a high point, will only transmit up to three kilometres away.